Originally Posted by
Sheep Guts
Agree, great graphic but there is a question unanswered. If the depth of the hydrophone is 4,600ft and they are correct that it would have to be at 6,000ft to have detected the ULB, then either the hydrophone depth is wrong, or their opinion of the pinger range is wrong (9,000 feet - 2289m) or the pinger is not as deep as 15,000ft.
As they did not seem to pass on top the pinger, maybe it is not even at 15,000ft.